Maintenance
Ampco Pumps Company
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Page 21
Seal Cutaways
Specific parts for Double
Mechanical Seals (9-14)
Part
1
Rotor
Nut
Assembly
2
Rotor
Nut
O
‐
Ring
3
ZP3
Rotor
4
Rota ng
Seal
O
‐
Ring
5
Rota ng
Seal
6
Sta onary
Seal
7
Sta onary
Seal
O
‐
Ring
8
Wave
Spring
9
Rotor
Hub
O
‐
Ring
10
Wave
Spring,
Outer
Seal
11
Outer
Seal
O
‐
Ring
12
Sta onary
Seal
(Double)
13
Seal
Seat
(Double)
14
Seal
Seat
O
‐
Ring
Seal Flush
For pumps with double seals, connect seal flushing
before operation. Operation of the pump without
proper flushing will
damage
seal faces. Flushing con-
nections are typically 1/8” female NPT with one side
being the inlet and the other the discharge. Flush
from the bottom to the top, using the lower connection
as the inlet and the upper connection as the dis-
charge. This ensures that air is removed from the
flush line with the flush area completely flooded
(Figure 38). Flush flow rate should be 1/4 GPM (30
psi max pressure). For high temperature applications
flush flow may be increased to remove excess heat.
Figure 38: Proper Flushing for
ZP3 Double Seal
Flush Out
Flush In